Fair Value Measurements (Details) (USD $) In Millions	3 Months Ended		9 Months Ended																		3 Months Ended	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011 Fair value measurements made on a recurring basis [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member]		Sep. 30, 2011 Fair value measurements made on a recurring basis [Member] Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]	Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Quoted Prices in Active Markets for Identical Assets or Liabilities (Level 1) [Member]	Sep. 30, 2011 Fair value measurements made on a recurring basis [Member] Significant Other Observable Inputs (Level 2) [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Significant Other Observable Inputs (Level 2) [Member]		Sep. 30, 2011 Fair value measurements made on a recurring basis [Member] Significant Unobservable Inputs (Level 3) [Member]	Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Significant Unobservable Inputs (Level 3) [Member]	Sep. 30, 2011 Fair value measurements made on a recurring basis [Member] Netting [Member]		Dec. 31, 2010 Fair value measurements made on a recurring basis [Member] Netting [Member]		Sep. 30, 2011 Fair value measurements made on a non-recurring basis [Member]	Sep. 30, 2011 Fair value measurements made on a non-recurring basis [Member]
Cash equivalents:
Equity securities					$ 409		$ 122		$ 409	$ 0	$ 0		$ 122		$ 0	$ 0	$ 0	[1]	$ 0	[1]
Special use funds:
Equity securities					1,724		1,986		638	741	1,086	[2]	1,245	[3]	0	0	0	[1]	0	[1]
U.S. Government and municipal bonds					683		622		545	495	138		127		0	0	0	[1]	0	[1]
Corporate debt securities					488		486		0	0	488		486		0	0	0	[1]	0	[1]
Mortgage-backed securities					519		447		0	0	519		447		0	0	0	[1]	0	[1]
Other debt securities					64		108		0	0	64		108		0	0	0	[1]	0	[1]
Other investments:
Equity securities					4		4		4	3	0		1		0	0	0	[1]	0	[1]
U.S. Government and municipal bonds					18		12		18	8	0		4		0	0	0	[1]	0	[1]
Corporate debt securities					29		32		0	0	29		32		0	0	0	[1]	0	[1]
Mortgage-backed securities					36		58		0	0	36		58		0	0	0	[1]	0	[1]
Other					15		15		5	5	10		10		0	0	0	[1]	0	[1]
Derivatives:
Commodity contracts					772	[4]	940	[4]	1,596	1,755	1,623		1,538		661	824	(3,108)	[1]	(3,177)	[1]
Interest rate swaps					31	[4]	107	[4]	0	0	31		107		0	0	0	[1]	0	[1]
Foreign currency swaps					23	[4]	48	[4]	0	0	23		48		0	0	0	[1]	0	[1]
Derivatives:
Commodity contracts					708	[4]	652	[4]	1,693	1,821	1,673		1,509		540	528	(3,198)	[1]	(3,206)	[1]
Interest rate swaps					307	[4]	123	[4]	0	0	307		123		0	0	0	[1]	0	[1]
Foreign currency swaps					10	[4]	4	[4]	0	0	10		4		0	0	0	[1]	0	[1]
Fair value of investments in commingled funds whose underlying investments would be Level 1 if those investments were held directly by the registrant					970		1,084
Carrying value of property, plant, and equipment prior to impairment charge																					79	79
Property, plant, and equipment, fair value disclosure																					28	28
Impairment charge	0	0	51	0																	51	51
Impairment charge, after-tax																					$ 31	$ 31

[1] Includes the effect of the contractual ability to settle contracts under master netting arrangements and margin cash collateral payments and receipts.

[2] At NextEra Energy, approximately $970 million ($875 million at FPL) are invested in commingled funds whose underlying investments would be Level 1 if those investments were held directly by NextEra Energy or FPL.

[3] At NextEra Energy, approximately $1,084 million ($980 million at FPL) are invested in commingled funds whose underlying investments would be Level 1 if those investments were held directly by NextEra Energy or FPL.

[4] See Note 2 for a reconciliation of net derivatives to NextEra Energy's and FPL's condensed consolidated balance sheets.